Carbureter-primer.



C. L. RAYFIELDL CARBURETER PRIMER.

APPLICATION FILED SEPT.26|1913.

Patented Apr. 10, 1917.

3 SHEETS-SHEET I C. L. RAYFIELD.

CARBURETER PRIMER.

APPLICATION FILED SEPT-26,198.

Patented Apr. 10, 1917.

3 SHEETS-SHEET 2.

|I|llI C. L. RAYFIELD.

CARBURETER PRIMER.

APPLICATION FILED SEPT-26.1913.

Patented Apr. 10, 1917.

3 SHEETS-SHEET 3.

SEED

s new ates,

iltarrinnn, and a resident of the city of Chicago, in the county of Cook and State of lllinois, have invented certain new and useful improvements in Carburotor-Primers; and l do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

It is a well known fact that in starting internal combustion engines it is oftentimes difficult to rotate the same a suficient amount by hand to induce carburetion of the air through the carbureter in order to produce a rich mixture capable of starting the engine. Various expedients have been resorted to for providing the engine with an initial rich charge, and for this purpose auxiliary pumps for pumping the fuel directly into the cylinders have been used, and sometimes fuel is introduced into the priming cups at the top of the cylinders, thus necessitating a separate operation for each cylinder of the engine.

This inventlon relates to a means for 1n:

jecting a charge of the fuel into the intakemanifold of an engine, thereby insuring a distribution of the same to the various cylinders for introduction thereto during the proper cycle of operation.

It is an object of this invention to provide a carbureter having auxiliary valve means connected thereon adapted to feed a. charge of fuel directly to the intake manifold of an engine to insure a rich starting charge therefor.

it is also an object of this invention to provide means integrally associated with the carburetor and communicating with the float feed chamber thereof, whereby fuel may be drawn therefrom and introduced into the intake manifold of the engine independently of the operation of the other elements of the carbureter.

It is also an object ofthis invention to i provide means for introducing a charge of fuel to the intake manifold'of an internal combustion engine by means communicating directly with the carburetor. i

It is also an object of this invention to provide positively actuated and, automatically operating valves communicating with the float feed chamber of a carburetor ada tthe intake m i therniore tion to provide an independ tion between the intake manifold ogins and the float feed chamber of bureter, whereby a charge of fuel a" i, lntroduced into the intake inanirold independently of the operation of other as of the carbureter.

it is finally an object of this invention to construct a carbureter having a priming means associated therewith simple in operation and construction and operating entirely independently of other mechanisms of the carbureter.

' The invention (in a preferred form) is hereinafter more fully described and defined in the accompanying drawings and specification.

in the drawings:

Figure 1 is a top plan view of a carbureter embodying a priming device embodying the principles of my invention. Fig. 2 is a fragmentary elevation of the float feed chamber, and showing a section of the priming mechanisms taken on line 2-2 of Fig. 3 is a section taken on line 3-3 0 ig. 2. Fig. l is an elevation of'a conventional type of internal combustion engine showing the carbureter connected thereon.

As'shown in the drawings:

The reference numeral 1 indicates as a whole an internal combustion engine provided with an intake manifold 2, and a carbureter denoted as a whole by the reference municates therewith by means of a passage 18, in the lower end thereof, such coinmunication however, being normally closed by a ball 17. Integral with saidelen'ient 1?, and

res

slightly to one side thereof, ieia cylindrical.

valve chamber'lQ, which communicates saidelement 17, by means of a passageEG,

and resting in the lower end of said chamber T 19, is a ball valve closure 21. Any suitable type of pipe connection'22, may be threaded and preferably into the upper open end of said chamber 19, for attachment thereto of a pipe 23, which is connected to the intake manifold of the internal combustion of the carbureter, thus permitting an introduction of fuel to the intake manifold irrespective of the position of said throttle valve.

A piston 24, is sli'dably mounted in said tubular element 17, and when in its lowest position, as shown in Fig. 2, closes the passage 20, thus preventing a flow of fuel from the float feed chamber of the carbureter through the respective pipes 22, and 23, to the manifold of the engine. For the purpose of actuating said piston 24, or lifting the same to open position, the same is provided with a rod or stem 25, which projects into a compartment or casing 26, suitably detachably .connected on one side of the cover of the float feed chamber and having journaled thereon to project therein an actuating bell crank 27, which may be connected to any suitable rod or cable for manual actuation thereof. Said bell crank 27, has an inwardly projecting arm 28, which projects into said casing 26, adapted to engage beneath a head 29, on the end of said stem 25, to lift the same and the piston therewith to open the communicating passages for the introduction of fuel to the intake manifold of the engine.

Qf course, the float feed chamber of the carbureter is connected to any suitable source of fuel supply by means of the pipes 30, the flow of fuel being controlled, as usual, thereinto, by means of a needle valve 31, connected for operation by a float 32.

The operation is as follows:

When it is desired to start the engine the throttle valve is closed, though not necessarily so, and the crank 27 actuated by any suitable means, thus opening the piston valve 24, so that with a rotation of the crank shaft of the engine the movement of the pistons in the cylinders will create a draft in the intake manifold, thus drawing a charge of liquid fuelup through the various passages 18, 20, and pipe 23, and spraying the same into the manifold. A rich mixture is thereby afforded, which is drawn into the respective cylinders at the proper time when the intake valves thereof are opened, and the engine may be easily started, thus obviating all priming operations by means of auxiliary mechanism.

Of course, after the engine has started the piston valve 24, is allowed to close by the re lease of said crank 27 and the carbureter then operates as usual. The chamber 19, serves to hold a suflicient quantity of fuel to feed-the intake manifold of the engine after the piston valve 24, has been closed, insuring operation thereof until proper carburetion begins to take place through the carbureter in the usual manner, the ball valve 21, in said chamber 19, of course acting to prevent a reverse flow of a fuel charge through the device.

I am aware that various details of construction may be varied through a wide range without departing from the principles of'this invention. I therefore do not'purpose limiting the patent granted otherwise than necessitated by the prior art.

I claim as my invention:

1. The combination with a carbureter .of a priming device comprising a chamber in communication with the interior of the float chamber of the carbureter, and a pipe line communicating into the manifold of an ene in Which the carbureter is connected beyond the throttle valve of the carbureter, a secondary chamber with'which said pipe line is in communication, a check valve controlling the flow from the float chamber into said first mentioned chamber, a check valve controlling the flow from said first mentioned chamber into said secondary chamber, a passage leading from said last mentioned check valve communicating laterally in said first mentioned chamber, and a the manifold of a gasolene engine.

3. In a device of the class described the combination with the float chamber of a carbureter, of a long upright cylindricalehamber associatedtherewith and communlcatmg thereinto, a valve controlling communication between said float chamber and said auxiliary chamber, a piston slide valve member movable'in said second mentioned chamber, and another upright auxiliary chamber connected through the side wall wlth said first mentioned auxiliary chamber and also connected with the intake manifold of a gasolene engine adapted to recelve a charge of fuel passed from said float chamber through said first chamber into said second chamber and to be drawn into the manifold by the draft of the engine. I

4. In a device of the class described 2. cylinder, a piston movable thereima check valve controlling the inlet through said cylinder to prevent a reverse flow through said inlet a chamber 1n communication with said tween said second auxiliary chamber and neeeeea cylinder, a check'valve in said chamber to prevent reverse flow from said chamber into said cylinder, said piston disposed to control the flow from said cylinder into said chamber, and a pipe connecting said chamber with the manifold pipe of an internal combustion engine.

5. In a device of the class described the combination with the float feed chamber of a carbureter, of an upright cylinder cast integral therewith ands communicating with the interior of said float feed chamber, a ball valve in preventing a reverse flow from said cylinder into said chamber, a piston movable vertically in said cylinder, an upright auxiliary chamber formed integral with said cylinder,l

a horizontal passage affording communication between said auxiliary chamber and said cylinder and adapted to be closed by said piston, a ball valve preventing reverse flow from said auxiliary chamber into said cylinder, 'and a pipe connecting said auxiliary chamber and the intake manifold of a gasolene engine.

6. Ina device of the class described the combination with the float feed chamber of a carbureter, of a vertically disposed cylinder formed on the exterior thereof, a piston the lower end'of said cylinder auxiliary chamber formed on one side there-' of, a pipe connecting said auxiliary chamber with the manifold of an internal combustion engine, and a piston valve disposed to slide over the inlet to said chamber to control the flow of fluid into said auxiliary chamber from said float feed chamber.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

CHARLES I1. RAYI IEIJD.

Witnesses:

CHARLES W. HILLS, Jr., FRANK Ii. HUDSON.

passage affording 

